Monday, June26, 2017 L-36.com


Marine Weather and Tides
Galveston, TX

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:20AMSunset 8:23PM Monday June 26, 2017 3:45 AM CDT (08:45 UTC) Moonrise 8:08AMMoonset 9:49PM Illumination 5% Phase: Waxing Crescent; Moon at 2 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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GMZ375 Waters From Freeport To The Matagorda Ship Channel From 20 To 60 Nm-waters From High Island To Freeport From 20 To 60 Nm- 956 Pm Cdt Sun Jun 25 2017
Rest of tonight..East winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Monday..East winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Monday night..East winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Tuesday..East winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Seas 2 feet. A chance of showers and Thunderstorms.
Tuesday night..Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Wednesday..Southeast winds 10 to 15 knots. Seas 3 feet. A chance of showers and Thunderstorms.
Wednesday night..South winds 15 to 20 knots. Seas 3 to 4 feet. A chance of showers and Thunderstorms.
Thursday..South winds 15 to 20 knots. Seas 4 feet building to 5 to 6 feet with occasional seas up to 7 feet in the afternoon. A chance of showers and Thunderstorms.
Thursday night..South winds 15 to 20 knots. Seas 5 to 6 feet with occasional seas up to 7 feet. A slight chance of showers and Thunderstorms.
Friday..South winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 7 feet. A slight chance of showers and Thunderstorms.
Friday night..South winds 15 to 20 knots. Seas 4 to 5 feet with occasional seas up to 6 feet.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 956 Pm Cdt Sun Jun 25 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Some scattered showers and Thunderstorms are possible across the waters through the next several days. Onshore winds will ramp up around mid week as we become sandwiched between surface high pressure over the eastern us and a developing surface cyclone over the lee of the rockies.

7 Day Forecast for Marine Location Near Galveston, TX
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location: 28.84, -94.35     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 260452
afdhgx
area forecast discussion
national weather service houston galveston tx
1152 pm cdt Sun jun 25 2017

Aviation 06z taf
the main concern for the next 6 hours will be convective trends
with another outflow boundary pushing into the area from the east.

Outflow has pushed through kgls headed towards klbx. This bounary
may be the focus for more convection later this morning. Tafs will
go with vcsh for kgls klbx but will need to monitor areas near
ksgr and khou going forward.

Overall don't think there will be much in the way of MVFR
conditions. Should clouds clear enough there may be some patchy
fog so will leave some 6sm in more rural terminals like kcxo.

Convection should ramp up again late morning into early afternoon
with day time heating and the good juicy moist airmass in place.

Extended portion of the tafs did not change much from the 00z taf
update.

Overpeck

Prev discussion issued 918 pm cdt Sun jun 25 2017
discussion...

an outflow boundary, or perhaps the actual front, was moving
southwestward into chambers and galveston counties and trinity bay
at 9:00 pm. There were quite a few other weaker boundaries that
were left over from the afternoon thunderstorms. An analysis of
the 00z upper air surface showed a weakness in the 500 mb ridge
over the lower mississippi valley into the northern gulf of
mexico, a moisture axis associated with a 700 mb trough over the
upper texas coast with another across norther la into tx, and a
moisture axis at 850 mb associated with a pressure trough across
the southern portions of al, ms and la into SE texas. The moisture
axis could be seen on satellite on water vapor and ir.

The hrrr, nam12 and texas tech 3 km WRF all keep decent chances
for scattered showers and thunderstorms over the interstate 10
corridor and the northwestern set of counties in the forecast
area. Least chances look to occur over the far northeastern areas.

Given the mesoanalysis and the short term high resolution model
forecasts, tweaked the rain chances upward over the central areas
through the remainder of the night. The NAM bufr forecast
soundings show some potential for gusty winds for another couple
of hours this evening--this may best be realized over the coastal
waters and bays.

40
prev discussion... Issued 631 pm cdt Sun jun 25 2017
aviation... 00z taf
based off radar trends and GOES 16 visible, it looks like the so
called frontal boundary has moved to around a line from kcll to
kiah to kbpt. Convection may linger around for another 1-2 hours
so a few terminals may be impacted, namely kiah with a strong
shower that produced a 23 knot wind gust but no lightning. Will
keep vcts in TAF for next hour. Otherwise most of the convection
is in between terminals so may need to amend tafs should
convection develop closer to the terminals.

I think the overnight period will be quiet and more stable than
the last couple of nights in which convection has developed around
09z or after. So again will go convection free with tafs until
late morning when day time heating will be needed to get storms
going along any existing boundaries. There was a plethora of
boundaries this afternoon so look for similar activity to form
tomorrow. Convective allowing models seem to hit the areas SW of
houston mid morning and then the rest of the area late morning
into early afternoon.

For now do not see any MVFR conditions forming overnight but
there could be some patchy fog should clouds clear enough with
the calm winds.

Overpeck

Preliminary point temps pops
College station (cll) 71 88 72 89 72 40 40 30 40 20
houston (iah) 73 87 73 88 73 40 60 30 50 20
galveston (gls) 78 85 78 85 78 40 40 30 40 30

Hgx watches warnings advisories
Tx... None.

Gm... None.

Discussion... 40
aviation marine... 39


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KXIH 25 mi31 min SE 8 82°F 75°F
42035 - GALVESTON 22NM East of Galveston, TX 27 mi56 min E 9.7 G 12 82°F 84°F2 ft1018 hPa (-1.4)76°F
42043 - GA-252 TABS B 31 mi106 min 7.8 G 12 76°F 83°F1017.9 hPa
GTOT2 40 mi46 min 81°F 85°F
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 41 mi46 min ESE 11 G 13 84°F1017.9 hPa (-1.4)
GRRT2 43 mi46 min ENE 8 G 9.9 81°F 85°F1018.3 hPa (-1.6)
LUIT2 44 mi46 min NE 9.9 G 12 81°F 85°F
RLOT2 - 8770971 - Rollover Pass, TX 47 mi46 min ESE 9.9 G 12 81°F 82°F1018.4 hPa (-1.4)

Wind History for Galveston Pleasure Pier, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
High Island 179A (Apache Corp), LA25 mi51 minSE 910.00 miA Few Clouds82°F75°F79%1017.9 hPa

Wind History from XIH (wind in knots)
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Last 24hrSE6S8CalmE4SE7SE10SE8SE10E5E9E13E13E13E10SE9SE16SE10S9SE10SE19SE12SE14SE13SE8
1 day agoSW10
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S12S10S11S10S6
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SW1143SW3W4CalmW4CalmCalmSE7SE11SE10SE10SE10SE6S12S6E9
2 days agoSW18SW17SW16
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SW16SW13SW13SW11SW8SW9SW7SW7
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SW8SW14S14SW13SW13S13S11S12S14SW15SW12
G17
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G15

Tide / Current Tables for Galveston Pleasure Pier, Gulf Of Mexico, Texas (sub)
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Galveston Pleasure Pier
Click for Map
Mon -- 06:21 AM CDT     Sunrise
Mon -- 06:44 AM CDT     2.13 feet High Tide
Mon -- 09:09 AM CDT     Moonrise
Mon -- 12:42 PM CDT     1.49 feet Low Tide
Mon -- 03:15 PM CDT     1.69 feet High Tide
Mon -- 08:22 PM CDT     Sunset
Mon -- 10:51 PM CDT     Moonset
Mon -- 11:52 PM CDT     -0.55 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.30.20.81.41.82.12.121.91.71.61.51.51.61.71.71.61.310.50.1-0.3-0.5

Tide / Current Tables for Galveston (Pleasure Pier), Texas
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Galveston (Pleasure Pier)
Click for Map
Mon -- 06:21 AM CDT     Sunrise
Mon -- 07:15 AM CDT     2.47 feet High Tide
Mon -- 09:09 AM CDT     Moonrise
Mon -- 01:30 PM CDT     1.40 feet Low Tide
Mon -- 04:21 PM CDT     1.51 feet High Tide
Mon -- 08:22 PM CDT     Sunset
Mon -- 10:51 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.30.20.81.422.32.52.42.221.71.51.41.41.51.51.51.41.10.70.3-0.1-0.4

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Houston/Galveston, TX (4,6,7,8)
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Ground Weather Radar Station Houston/Galveston, TX
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weather_mapweather_map weather_map

Gulf Stream Current


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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.